There are 3 main functions of SharePoint.
1. Data Storage
SharePoint helps in the storage of large data in an arranged form. The data is segregated based on its features and requirements. This enables easy access to information.
2. Team Work
SharePoint helps in the easy sharing of files and easy editing by all the members of the group. It eases teamwork while maintaining the privacy of the content.
3. Work Organization
It enables smooth work by clearly assigning the jobs and stating the Workflow. It also enables highlighting the important aspects for quick identification.